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星期三二月 7 16:02:56 HKT 2007

ÎÒµÄÍ¨ÓÃPhoto modelÎª£º

class Photo(models.Model):
    title = models.CharField(maxlength=128)
    remark = models.TextField(null=True)
    photo = models.ImageField(upload_to='pics/%y/%m')
    photo_type = models.ForeignKey(ContentType)
    object_id = models.IntegerField()
    photo_object = models.GenericForeignKey()
    votes = models.IntegerField(blank=False, default=0)
    level = models.IntegerField(blank=False, default=0)

School Model:

class School(models.Model):
 name = models.CharField(maxlength=128, unique=True)
 category = models.IntegerField(blank = False)
 cache = models.IntegerField(default=0)
 inventor = models.ForeignKey(User)
 inventor_ip = models.IPAddressField(blank=False)
 photo = models.GenericRelation(Photo)

µ±ÎÒÔËÐÐ£º

from xuyong.alumni.models import School
school = School.objects.get(id = 1)
school_photo=school.photo.all()
photo = school_photo.filter(level=1)

>>photo

Traceback (most recent call last):
  File "", line 1, in ?
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 100, in __len__
    return len(self._get_data())
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 430, in _get_data
    self._result_cache = list(self.iterator())
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 171, in iterator
    select, sql, params = self._get_sql_clause()
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 444, in _get_sql_clause
    joins2, where2, params2 = self._filters.get_sql(opts)
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 574, in get_sql
    joins2, where2, params2 = val.get_sql(opts)
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 622, in get_sql
    return parse_lookup(self.kwargs.items(), opts)
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 734, in parse_lookup
    joins2, where2, params2 = lookup_inner(path, lookup_type, value, opts,
opts.
db_table, None)
  File "c:\python24\lib\site-packages\Django-
0.95.1-py2.4.egg\django\db\models\q
uery.py", line 835, in lookup_inner
    raise TypeError, "Cannot resolve keyword '%s' into field" % name
TypeError: Cannot resolve keyword 'content_type' into field

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标题：[python-chinese] [django] GenericForeignKey 对象的filter问题